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Science Trivia Questions and Answers
9 free science trivia questions with answers and explanations.
1What is the chemical formula for water?
ACO2
BH2O✓
CNaCl
DO2
💡 Explanation: Water is H2O — two hydrogen atoms bonded to one oxygen atom. This simple molecule is essential for all life.
2How many bones are in the adult human body?
A186
B206✓
C226
D246
💡 Explanation: The adult human body has 206 bones. Babies are born with around 270-300 bones, which fuse as they grow.
3What planet is closest to the Sun?
AEarth
BMars
CMercury✓
DVenus
💡 Explanation: Mercury is the closest planet to the Sun, orbiting it in just 88 Earth days.
4What force keeps planets orbiting the Sun?
AMagnetism
BGravity✓
CCentrifugal force
DNuclear force
💡 Explanation: Gravity is the force that keeps planets in orbit around the Sun. The Sun's massive gravitational pull keeps planets on their elliptical paths.
5What is the process by which water changes from liquid to gas?
ACondensation
BEvaporation✓
CPrecipitation
DSublimation
💡 Explanation: Evaporation is the process by which liquid water converts to water vapor (gas), driven by heat energy.
6Which scientist is credited with discovering gravity after observing a falling apple?
AGalileo Galilei
BAlbert Einstein
CIsaac Newton✓
DNikola Tesla
💡 Explanation: Sir Isaac Newton famously developed his theory of gravity around 1666, inspired (legend says) by watching an apple fall from a tree.
7How many elements are in the periodic table (as of 2024)?
A108
B112
C118✓
D124
💡 Explanation: The periodic table currently contains 118 confirmed elements, from hydrogen (1) to oganesson (118).
8What is the unit of electrical resistance?
AVolt
BAmpere
CWatt
DOhm✓
💡 Explanation: The ohm (Ω) is the unit of electrical resistance, named after German physicist Georg Simon Ohm.
9What type of energy does the sun produce through nuclear fusion?
AChemical energy
BRadiant energy✓
CKinetic energy
DThermal energy
💡 Explanation: The sun produces radiant (light) energy and thermal energy through nuclear fusion, fusing hydrogen atoms into helium.
About Science Trivia Questions
These science trivia questions cover a wide range of topics within the science category. All questions include four multiple-choice options (A, B, C, D) and a detailed answer explanation to help you understand the topic better.
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